| 109 | } |
| 110 | |
| 111 | absl::Status ExpressionContainer::AddAlias(absl::string_view alias, |
| 112 | absl::string_view name) { |
| 113 | if (!IsValidAlias(alias)) { |
| 114 | return absl::InvalidArgumentError(absl::StrCat( |
| 115 | "alias must be non-empty and simple (not qualified): ", alias)); |
| 116 | } |
| 117 | |
| 118 | if (!IsValidQualifiedName(name)) { |
| 119 | return absl::InvalidArgumentError( |
| 120 | absl::StrCat("invalid qualified name: ", name)); |
| 121 | } |
| 122 | |
| 123 | if (auto it = aliases_.find(alias); it != aliases_.end()) { |
| 124 | return absl::InvalidArgumentError(absl::StrCat( |
| 125 | "alias collides with existing reference: ", alias, " -> ", it->second)); |
| 126 | } |
| 127 | |
| 128 | if (container_ == alias || |
| 129 | (container_.size() > alias.size() && |
| 130 | absl::string_view(container_).substr(0, alias.size()) == alias && |
| 131 | container_.at(alias.size()) == '.')) { |
| 132 | return absl::InvalidArgumentError( |
| 133 | absl::StrCat("alias collides with container name: ", alias)); |
| 134 | } |
| 135 | |
| 136 | aliases_.insert({std::string(alias), std::string(name)}); |
| 137 | return absl::OkStatus(); |
| 138 | } |
| 139 | |
| 140 | absl::string_view ExpressionContainer::FindAlias( |
| 141 | absl::string_view alias) const { |